3
IOM-A-Deringer 20G/20GX/30G/30GX_6-8
2005
EDP#2916000
© 2020 Watts
Removing Access Port Cover Plate
C
D
Removing the First Dual-action
TM
Check Module
FLOW
C
A
A
Removing the Second Dual-action Check Module
A
Deringer 30G/30GX:
Disassembly and Maintenance of Bypass Check Valve
A
C
B
A
1. Using a
15
/
16
" socket wrench loosen all eight
bolts on the access port cover plate (A).
2 Remove bolts and tapered washers (B) and
store in a safe place. Be careful not to lose
tapered washers as the access cover will not
seal properly without the tapered washers.
3. Remove access port cover plate (C). Do
not remove access port O-ring (D).
B
1. Use a
15
/
16
" socket wrench to loosen the check retainer
bolts on both sides of the valve body (A). Do not com-
pletely remove check retainer bolts from valve body.
Loosen the bolts until the ends of the bolts are flush
with the inner wall of the valve body (B).
2 Insert a flathead screwdriver between the inner valve
body and the first check module flange (C), gently push
the first check module in the downstream direction until
the first check module can easily be removed from the
access port by hand.
A
A
1. Use a 1
1
/
8
" socket wrench to loosen the check
retainer bolts on each side of the valve body (A). Do
not completely remove check retainer bolts from valve
body. Loosen the bolts until the ends of the bolts are
flush with the inner wall of the valve body (B).
2. Insert a flathead screwdriver between the inner valve
body and the second check module flange (C), gently
push the second check module in the upstream
direction until the second check module can easily
be removed from the access port by hand.
FLOW
C
B
D
Part 1
1. Use an adjustable wrench to rotate check cover (A)
counterclockwise to remove.
2. Examine cover plate O-ring (B) for damage or fouling.
3. Remove spring (C).
4. Remove check poppet assembly (D) and examine for damage
or fouling.
5. Examine seat cage, located inside the bypass check valve body,
for damage or fouling to the sealing seat. Do not remove unless the
seat cage is being replaced.
6. Reverse the order of above instructions to reassemble bypass
check valve.
A
B
